High-tension discharge apparatus.



l E. J. ROSE. HIGH TENSION DISCHARGE APPARATUS.'

APPLICATION FILED JUNE Z8, 1909. l

' j Patented June`27, 1911.

*To dll whom it may concern:

UNTED STATES .Partnr ornic a.,

EDGAR J'. ROSE, 0F LOS ANGELES,. CALIFORNIA.

` HIGH-TENSION DISCHARg-E `ALEIEARfA'J.'US.

Speccation of Letters Patent.- Patented `Jim@ 27, 1911,

Application led June 28,1909. Serial No. 504,901.'

Be it. known that I, EDGAR J. ROSE, a citizen of the United States, residing at Los Angeles, in thecounty of-LosfAngeles and State of California, have invented a new and useful High-Tension V'Discharge Apparatus,

of which the followirijg is a specification.

One object of the present invention is to provide an apparatus adapted for use with direct or alternating cl'irrentfwhich does "not require for its use any special knowledge or skill by the operator.

I Another object of the invention is ,to provide an'ap-paratus for the stated purpose which can be used to produce oscillatory currentuof differing character, particularly with regard to the frequency and intensity of the current. y

Another object of the 'invention is to provide a high` tension apparatus in which maximum prolongationv of the. period of closure of circuit is provided, whereby l -ain enabled to cause efcient energization Vof a self-induction coil of large inductance under high periodicities. i The accompanying drawings illustrate the invent-ion, and referring thereto:

Figure 1 is a diagram 4of the circuit connections, the controlling switches being 'shown in plan. Fig. 2 .is a horizontal section of the circuit-controlling electro-magnetic device. Fig, 3V is a partial elevation thereof. Fig. 4 is a side elevation of the controlling switch means for connecting the apparatus to direct or alternating circuit.

The apparatus comprises a primary circuit provided with means for connection to either alternating or direct supply circuit with velectro-magnetically operated circuit controlling means, self-inductionv means and a condenser'k for' producing electric oscillations in thes primary circuit, and a secondary circuit in inductive relation to the primary circuit. l

The circuit connecting means conaiprises two switches 1, 2, adapted respectivelyjfor operation with direct or alternating .current the switch 1 is a double throw switch for rel-y v versing polarity or maintaining a given polarity, irrespective ofthe direction of the direct current in the circuit to which it is connected. Each ofzthe switches 1, 2 may be of the constructionx shown in'Figs. 1 and 4, comprising an insulating plate or bar 4, pivotally mounted at 5 on standards 6, a leaf spring. 7 being fastened-at its middle tothe mid-length of said plate 4 and with its end portionsspringing free from saidV plate, so that these end portions bear `against the lstandards 6 to make a bond or contact there-4 withand the outer ends of said spring means 7 bear against the fixed contacts 8 of thefretactftherewith.

In order to prevent both of the switches l, 2 from being operated simultaneously an interlocking means is provided consisting, for example, of a frame or bar 10 slidably mounted on the base 5 of the apparatus and having a handle 11 and one or more proiections 12 so placed that a projection 12 is spective switches to maintain efficientcon-1 Jalways under one or the other of the switch members 4, so that nboth can not be brought `into closed position simultaneouslyij The fixed contacts 8 of the switch 1 are connected respectively by wires 13 to terminals 14 for a direct current circuit. Posts 8, 6 onone side of the switch 2 are connected by wires 17 to a terminal 15 for an alternating supply circuit, said wire 17. including the primary ccoil 18 of a transformer. The secondary coil 19 of said transformer is convnected toa circuit 26 including'the posts 8,

6 on the other side of said switch 2, so that wheat-heswitch is in closed position the two plates .7 thereof close the primary circuit of i tween the two sides 23, 25 of the main primary circuit. A discharge circuit 16,

cuit at opposite sides 29, '30 of the circuit "ontroller, includes a condenser and the @primary `oil BBV-of the high tension transformer (liose secondary 34 is connected in a Ahigh tension discharge circuit 35 provided with the electrodes`36f .The primary of this transformer may be further provided with same number of turns as the main-winding 33, 'but of less cross section, so as lto present a higher resistance.

connected to the two sides of tl'ie main cira 'supplementary winding .537 havingf the 38, 39, section 38 being larger, or of greater capacity, and means are provided 'for clnecting said sections separately, in series, or in parallel in the dischargg circult, said means consist-ing o'f a plug switch provided with three split contact-sockets 40,41, 42. One side of socket 40 is connected by Wire 43 with one side of socket 41, the other side` of socket 40 being connected by wirel 44 to one side of socket 42. The vother side of socket 41 is connected to circuit wire 16 and to one side of condenser 38, the other side of said condenser being connected by wire 45 to wire 44'. The other side of socket 42 is connected to a wire 16 completing the circuit to the transformer, said wire being connected to' one side of condenser 39 the other side of which is Iconnected by wire 46 with wire 43. rlwo plugs, indicated at 50,51, are provided. By placing a plug 50 in t-he socket 40 the condensers are connected in series with the discharge circuit, this being the condition of least capacity, producing the highest frequency and smallest quantity of discharge. By placing the plug 51 in the socket 41, the condenser 38 is shunted, so that condenser 39 is connected alone in the circuit. By placing the plug 50 in socket 40 and plug 51 in socket 42, t-he condenser 39 is shunted, leaving the condenser 38 alone in the circuit. By placing the two plugs in sockets 41 and 42, leaving the socket 40 open, the two condensers are connected in parallel, these successive connections giving differing capacities which increase in the order stated, the connection in parallel being that of largest capacity corresponding to lowest frequency and greatest quantity of discharge.

The electrofmagnetic control-ling device is preferably of the construction shown in Fig. 2, the coil 27 thereof being wound on a core 53 of magnetic material, for example, laminated iron, said core having a central bore 49, in which slides Vlongitudinally a nonmagnetic stem 54 of the armature 30, said armature being formed as a disk fast on said 'st em. A coil spring 55 within the bore v49A engages with the rear end of the stem 54 and with an adjustable screw plug 56 screwing into the rear end of the bore 49 and vtends to force the armature 30 away from the operating coil. Contact 28 of the circuit controller is carried by the said stem 54 and contact 29 of said controller is carried by a screw 58 working in a standard 59, said standard being provided. with a binding post 60. The standard 59 is preferably laminated for radiation of heat therefrom and laminae 61, 62 are provided on the screw 58 and on the stem 54 for radiation of heat.

It is acharacteristic of the form of circuit controller described when connected in the circuit as above stated and when the parts are properly proportioned that its operation material interruption of the current. The

time of contact or of virtual contact is prolonged at each movement of the contacts to such an extent that the intervening periods of absolute break become negligible. For this purpose it is necessary that the pressure of the return spring 55 should be adjusted by the screw 56, so that the time period of the oscillatory device, constituted by the armature 30, stem 54, and spring 55, is shorter than the period of oscillation of the electric circuit; or, so that at or before the time that the current has died away to zero in any oscillations, the spring 55 will have brought the' parts back to normal position, thereby rest-ablishing the current. By'thus prolonging the period of contact I am enabled to provide for efficient energization of self-imluction meansfof relatively large inductance,lwl1ile operating under high frequencies. A iXed terminal 65 is provided on base of the circuit controller, for connection of the circuit wire 25, and the connection to the stein 54 and contact 28 is made by a flat strip 66 fastened to this terminal and bent in U-shape, with its end attached to stem 54, this strip being of thin metal sufficiently flexible to prevent it from having a substantial effect on the motion of the armature, which is slidably supported in the bore 49 and is movable freely one way by the action of the armature, and the other wayby the action of the spring.

The apparatus is used as follows: The connections are made to the supply -circuit either by the terminals 14 or 15, according to whether the supply circuit is direct or alternating in character. If direct current is being used, switch 1 is operated in one or v the other direction according to the direction of the supply current, this being particularly desirable in X-ray work where the direction of the discharge is of importance. The current passes from a terminal 14 through upper wire 13, upper members 8, 7, 6 of switch 1, wires 24, 23, circuit 31, through contacts 29, 28, to coil 27 of the electro-magnet, thence through the self-induction coil 21, through wires 25, 24 and lower members 6, 7, 8 of switch 1 and lower wire 13 to the 'supply terminal. Electro-magnetic coil 27 then operates the armature 30 to suddenlyincrease the resistance between contacts 28, 29, so thatthe selfinduction coil 21 is enabled to produce a self-induction discharge of high tension which passes for the most part in the discharge circuit 16 including the primary coil 33 of t-hc high tension transformer and a condenser. In the resultant rise of potential at the condenser, a point is reached where the condenser will itself discharge back through the discharge circuit 16 and the so i break or gap at the cont-acts /28, 29, this condenser discharge being in a circuit exclusive of the self-induction means 21 and duced, the frequency and intensity of the Y increase the duration ofthe discharge,.vas the circuitsY established through l the two coils discharge depending upon the connection of the condensers,i as above stated.

In using alternating current, the supply circuit is connected tothe terminals 15 and the switch 2 is closed, the alternating current passing through theupper members of the switch and through the circuit 17 and the primary coil 18-of the transformer. The current thereby generatedl in the secondary coil-'19 passesthrough the circuit I20 and lower VYmembers of switchv 2 to the main charging circuit 23, 25, through which it energizes the self-induction means 21 and'f the electro-magnetic coil 27, as above described. By properly adjusting the screw .56 of theelectrolmagnetic circuit controlling device, said device is made responsive tothe alternating lcurrent in such vmanner that lit Vquickly adjusts itself lto synchronism with the alternating current. In fact, it is found that even'belfore the armature has come into synchronism with the current, there is a tendency for it to take'up a condition of synchronism with a multiple period of the current, for example, every third or fourth oscillation, until it 'finally drops into complete sy'nchronism. By providing the two coils 33, 37 of different resistance in the primary of the transformer, I am enabled to will have a different time period on account of the diiferencefin resistance so that the current will rise to a maximum in the circuit through the coil ofhigher resist-ance before it will rise to a maximum in the other coil, the'v oscillatory discharges' from the two coils, therefore alternating to'fsome extent. What I claim is: 4 1. In a high tension discharge apparatus, a charging circuit comprising means for connection of supply current, a self-induction means, and a circuit controller, electromagnetic means for., operating saidcircuit `circuit controller bein controller comprising a coi1,- an armature controlled thereby and operating the circuit controller, and a spring acting on the armature in opposition to the coil, the time period of the electro-magnetic operating means being shorterthan the time period of the chargingcircuit, so that at each Yoperation the electro-magnetic operatingmeans restores the normal condition before the discharge of the self-induction coil ceases, and a discharge circuit including# a condenser and high tensionu transformer connected to said circuit cont-roller.

v2. In a high tension discharge` apparatus, the combination with the charging circuit provided with Aconnections for supply current and including a self-induction coil'and a circuit controller, of electro-magnetic opl time period of said electro-magnetic operating meansu being shorter than the time period of the "charging circuit there-for, comprising a coil, a core therein,'an armature for said corefa stem of non-magnetic material Vslidably mounted in the core and carrying the armature, whereby the armature is yfloating supported, a coil spring mounted withiny the core and engaging with said stem to ress the armaturein opposition to the action of the coil thereon, a screw working in the core tc adjust the pressure of said spring, one of the contacts of the mounted on said stem, a fixed terminal or the charging circuit, a flexible metallic bonding connection between said terminal and said contact, said bonding connection being sufficiently flexible to be without substantial effect on the movement of the armature, and a screw adjustably mounted with relation 'to the said electro-magnetic device, the other contact of the circuit controller being carried by said screw.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 17th.day ofJune 1909.

EDGAR J. ROSE.

` In presence of "rHUR P. KNIGHT P. H. SHELTON. 

